Methane oxidation in water using hydrogen peroxide with a μ-nitrido iron phthalocyanine complex grafted on silica has been investigated in detail. Methyl hydroperoxide is identified as the main primary reaction product from methane oxidation. The catalyst is unstable under reaction conditions and this is discussed. However, the unmodified silica support is also found to be active for this reaction, and in particular, a Fe/SiO 2 catalyst prepared by wet impregnation is also found to be as effective as the μ-nitrido iron phthalocyanine complex grafted on silica, with higher selectivity to useful oxygenates (>80%) and displays minimal leaching or instability. A method for the reliable quantification of CO 2 in both the gas and aqueous phase is reported as this presents a key experimental difficulty in the oxidation of methane in aqueous media. © 2012 Elsevier Inc. All rights reserved.
Methane oxidation using silica-supported N-bridged di-iron phthalocyanine catalyst / Forde, Michael M.; Grazia, Bezzu C.; Armstrong, Robert; Jenkins, Robert L.; Rahim, Mohammed Hasbi Ab; Carley, Albert F.; Dimitratos, Nikolaos; Lopez-Sanchez, Jose Antonio; Taylor, Stuart H.; McKeown, Neil B.; Hutchings, Graham John*. - In: JOURNAL OF CATALYSIS. - ISSN 0021-9517. - STAMPA. - 290:(2012), pp. 177-185. [10.1016/j.jcat.2012.03.013]
Methane oxidation using silica-supported N-bridged di-iron phthalocyanine catalyst
Dimitratos, Nikolaos;Lopez-Sanchez, Jose Antonio;
2012
Abstract
Methane oxidation in water using hydrogen peroxide with a μ-nitrido iron phthalocyanine complex grafted on silica has been investigated in detail. Methyl hydroperoxide is identified as the main primary reaction product from methane oxidation. The catalyst is unstable under reaction conditions and this is discussed. However, the unmodified silica support is also found to be active for this reaction, and in particular, a Fe/SiO 2 catalyst prepared by wet impregnation is also found to be as effective as the μ-nitrido iron phthalocyanine complex grafted on silica, with higher selectivity to useful oxygenates (>80%) and displays minimal leaching or instability. A method for the reliable quantification of CO 2 in both the gas and aqueous phase is reported as this presents a key experimental difficulty in the oxidation of methane in aqueous media. © 2012 Elsevier Inc. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
